For those of you who use processing (Crossover, Delay, EQ, etc) between the FOH console and the amps, what do you use? (Driverack, Protea, DP224/226, BBS, EAW processing, Shure DSP, etc) My XTA DP224 takes care of my biamped EAW system's processing duties. What do you use? Do you like it? Why? Any problems?